261129234 has 8 divisors (see below), whose sum is σ = 522258480. Its totient is φ = 87043076.

The previous prime is 261129233. The next prime is 261129241. The reversal of 261129234 is 432921162.

It is a sphenic number, since it is the product of 3 distinct primes.

261129234 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (261129233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21760764 + ... + 21760775.

It is an arithmetic number, because the mean of its divisors is an integer number (65282310).

Almost surely, 2^261129234 is an apocalyptic number.

261129234 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

261129234 is a wasteful number, since it uses less digits than its factorization.

261129234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43521544.

The product of its digits is 5184, while the sum is 30.

The square root of 261129234 is about 16159.4936183038. The cubic root of 261129234 is about 639.1731134293.

The spelling of 261129234 in words is "two hundred sixty-one million, one hundred twenty-nine thousand, two hundred thirty-four".